The other way to go would be to just bring an inexpensive power inverter along, and plug in an A/C hot glue gun. It'll work as well as it does on your bench.

Our soaring club goes on slope soaring trips to a neighboring state, and I've found a power inverter to be of great use for many field repairs, such as soldering, charging a LiIon powered Dremel tool, using a drill, etc. Then you don't have to buy as many battery powered tools at all.

For small indoor planes, with Fragile foam (My Kyosho micro) : works brillantly. The kyosho has fragile foam, that even foam safe CA will meltAbsolutey no problems with the portable glue gun. Fixed a tear across 2/3 of the wing & was back up flying again.

The HK one is only 10Watts,so i wouldn't expect much heat from that one.And how do you determine which are low-temp sticks?All i generally see around here are the semi-clear ones.They work fine in my 240v jobbie,but i have no idea what the temp range is.